LIFE SCIENCE

Detailed explanation-1: -These tissues are derived from the germinal layers of embryonic cells. The ectoderm is the outer layer, and the mesoderm is the middle layer. The development of the stomach, colon, liver, pancreas, urinary bladder and other essential organs in the body is connected with the endoderm layer.

Detailed explanation-2: -The mesoderm specifies the development of several cell types such as bone, muscle, and connective tissue. Cells in the endoderm layer become the linings of the digestive and respiratory system, and form organs such as the liver and pancreas.

Detailed explanation-3: -The mesoderm is a germ layer that arises during gastrulation, and is present between the ectoderm, which will turn into skin and central nervous system cells, and the endoderm, which will produce the gut and the lungs (4).